Red errors in log during parity rebuild

My log shows a large amount of the following error lines yesterday:

Apr 19 06:46:23 Tower nginx: 2020/04/19 06:46:23 [error] 16603#16603: nchan: Out of shared memory while allocating message of size 9468. Increase nchan_max_reserved_memory.
Apr 19 06:46:23 Tower nginx: 2020/04/19 06:46:23 [error] 16603#16603: *5303164 nchan: error publishing message (HTTP status code 500), client: unix:, server: , request: "POST /pub/disks?buffer_length=1 HTTP/1.1", host: "localhost"
Apr 19 06:46:23 Tower nginx: 2020/04/19 06:46:23 [error] 16603#16603: MEMSTORE:01: can't create shared message for channel /disks
Apr 19 06:46:24 Tower nginx: 2020/04/19 06:46:24 [crit] 16603#16603: ngx_slab_alloc() failed: no memory
Apr 19 06:46:24 Tower nginx: 2020/04/19 06:46:24 [error] 16603#16603: shpool alloc failed
Apr 19 06:46:24 Tower nginx: 2020/04/19 06:46:24 [error] 16603#16603: nchan: Out of shared memory while allocating message of size 9468. Increase nchan_max_reserved_memory.
Apr 19 06:46:24 Tower nginx: 2020/04/19 06:46:24 [error] 16603#16603: *5303167 nchan: error publishing message (HTTP status code 500), client: unix:, server: , request: "POST /pub/disks?buffer_length=1 HTTP/1.1", host: "localhost"
Apr 19 06:46:24 Tower nginx: 2020/04/19 06:46:24 [error] 16603#16603: MEMSTORE:01: can't create shared message for channel /disks

The errors were not there before the 19th and are not here after 19th, system has not been rebooted.

The erros appeared yesterday during the time that a parity rebuild was running (due to me removing a couple of old drives out of the array). System appears to be functioning fine at the moment.

Diagnostics are attached.

tower-diagnostics-20200420-1349.zip

Edited April 20, 20206 yr by Helmonder